I'm not a seasoned vet and can't compare the Zapco but I've had the Marts BTX8 in my ride for about a year, I love it and it's super affordable. I think I paid $120 or so. Mine balances a 1000w rms 12" for sub bass, a 300w 10" for midbass, 2x 150w 6X9 components for midbass/midrange and 2x 150w...